A. Water is important B.How to Make Ponds C.ANewWay to Get Fresh Water D.Change SeaWater into Clean Water 答案 9(1)D(2)B(3)D(4)B(5)C 结果三 题目 BDo you know how to get fresh water in an island?There is a new way of getting fresh water.First people makesome long ...
How much seawater has been sprayed into the Fukushima Daiichi nuclear reactors to keep them cool More (31) than the number of tons of water is the amount of sea salt that was (32) in the reactors: ninety-nine thousand pounds (33) in reactors NO. 2 and 3, and fifty seven thousand in...
From here the seawater is further filtered by the sand filters, which are usually two in number. They are effective in the removal of solid particles and micro-organisms from the water. Sand filters themselves require backwashing by either seawater or fresh water at least once a day when the ...
This may seem strange to you, since about 75percent of the earth’s surface(表面)is covered with water. But about 97 percent of this huge amount(数量)is seawater, or salt water. Man can only drink and use the other 3percent—thefresh water that comes from rivers,lak...
英语作文 How to protect whale xx 英语作文 How to protect whale xx 英语作文:How to protect whale 生态环境破坏越来越严重的今天,保护鲸鱼的责任也越来越 大。下面是语文迷的关于保护鲸鱼的范文,希望对你有帮助。 Marine environment is one in water, seawater tolerance hydrolyzate and suspended solids, seab...
You might have heard that some cities are running out of(用尽) water. How can a city run out of water? To answer this question, we need to take a look at where our water comes from.Water covers 70 percent of Earth's surface(表面). But most of that is seawater. Fresh water is wh...
题目The world is not only hungry,but it is also thirsty for water.This may seem strange to you,since nearly 70% of the earth's surface is covered with water.But about 97% of that is sea water or salt water.Man can only drink and use the other 3% fresh water ...
The vapor diffuses through the pores and is drawn off, to be condensed again into liquid water. According to Sirkar, his system is extremely efficient -- it can produce 80 liters (21 gallons) of drinking water per 100 liters (26 gallons) of seawater, about twice what existing ...
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use fresh water once again D. make use of seawater 相关知识点: 试题来源: 解析 答案:B 解析: 从文中“Today in most large cities, fresh water is used only once, then it runs into waste system. But it is possible to pipe the used water to a purifying factory. There it can be ...